Oleg Nesterov f7da04c9e3 ptrace/x86: flush_ptrace_hw_breakpoint() shoule clear the virtual debug registers ... flush_ptrace_hw_breakpoint() destroys the counters set by ptrace, but "leaks" ->debugreg6 and ->ptrace_dr7. The problem is minor, but still it doesn't look right and flush_thread() did this until commit 66cb591729 ("hw-breakpoints: use the new wrapper routines to access debug registers in process/thread code"). Now that PTRACE_DETACH does flush_ too this makes even more sense. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jan Kratochvil <jan.kratochvil@redhat.com> Cc: Michael Neuling <mikey@neuling.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Will Deacon <will.deacon@arm.com> Cc: Prasad <prasad@linux.vnet.ibm.com> Cc: Russell King <linux@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2013-07-09 10:33:26 -07:00
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arm	ptrace/arm: revert "hw_breakpoints: Fix racy access to ptrace breakpoints"	2013-07-09 10:33:25 -07:00
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powerpc	ptrace/powerpc: revert "hw_breakpoints: Fix racy access to ptrace breakpoints"	2013-07-09 10:33:25 -07:00
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sh	ptrace/sh: revert "hw_breakpoints: Fix racy access to ptrace breakpoints"	2013-07-09 10:33:26 -07:00
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x86	ptrace/x86: flush_ptrace_hw_breakpoint() shoule clear the virtual debug registers	2013-07-09 10:33:26 -07:00
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